Internal speaker, internal microphone, external sustain pedal and USB interface. It offers 88 standard-size keys for real playing feel and muscle memory development, with 128 built-in sounds, 128 built-in rhythms, as well as 30 backing tracks, stereo speakers and much more. With up to 8 hours of normal playing time on a full charge, you can really enjoy playing wherever you want. When you are done, it folds up for easy storage.Or connect to an amplifier for more volume or effects. Take to rehearsals and jam sessions. Note identifier stickers to assist learning to play and read music. Brand new in box mint condition. This item is in the category "Musical Instruments & Gear\Pianos, Keyboards & Organs\Electronic Keyboards". The seller is "adamwestbay" and is located in this country: CA. This item can be shipped worldwide.